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GB2456968A - Magnets for use in magnetic resonance imaging - Google Patents

Magnets for use in magnetic resonance imaging Download PDF

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Publication number
GB2456968A
GB2456968A GB0908983A GB0908983A GB2456968A GB 2456968 A GB2456968 A GB 2456968A GB 0908983 A GB0908983 A GB 0908983A GB 0908983 A GB0908983 A GB 0908983A GB 2456968 A GB2456968 A GB 2456968A
Authority
GB
United Kingdom
Prior art keywords
magnet
magnetic resonance
primary coils
magnets
direction opposite
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB0908983A
Other versions
GB0908983D0 (en
GB2456968B (en
Inventor
Stuart Crozier
Huawei Zhao
Feng Liu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NMR Holdings No 2 Pty Ltd
Original Assignee
NMR Holdings No 2 Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from AU2006905993A external-priority patent/AU2006905993A0/en
Application filed by NMR Holdings No 2 Pty Ltd filed Critical NMR Holdings No 2 Pty Ltd
Publication of GB0908983D0 publication Critical patent/GB0908983D0/en
Publication of GB2456968A publication Critical patent/GB2456968A/en
Application granted granted Critical
Publication of GB2456968B publication Critical patent/GB2456968B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/38—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field
    • G01R33/381—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets
    • G01R33/3815—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using electromagnets with superconducting coils, e.g. power supply therefor
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
    • G01R33/42—Screening
    • G01R33/421—Screening of main or gradient magnetic field

Landscapes

  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Epidemiology (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

A magnetic resonance system uses a shielded superconducting magnet to produce a dsv useful for specialist imaging in an overall short magnet system at field strengths 1.5Tesla and above. The magnet includes at least a first central coil C1, which has a length of at least 25% of the overall length of the magnet, and is used in concert with a series of symmetric primary coils, at least one set of which carry current in a direction opposite to that of the central coil. Force balancing is advantageously used in the design of the coils. The primary coils are shielded by at least one shielding coil, which carries current in a direction opposite to the majority of the primary coils. The magnet resonance system can be used for orthopedic imaging.
GB0908983A 2006-10-27 2009-05-26 Magnets for use in magnetic resonance imaging Active GB2456968B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AU2006905993A AU2006905993A0 (en) 2006-10-27 Magnets for use in Magnetic Resonance Imaging
AU2007903151A AU2007903151A0 (en) 2007-06-12 Magnets for use in Magnetic Resonance Imaging
PCT/AU2007/001647 WO2008049174A1 (en) 2006-10-27 2007-10-26 Magnets for use in magnetic resonance imaging

Publications (3)

Publication Number Publication Date
GB0908983D0 GB0908983D0 (en) 2009-07-01
GB2456968A true GB2456968A (en) 2009-08-05
GB2456968B GB2456968B (en) 2010-03-10

Family

ID=39324035

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0908983A Active GB2456968B (en) 2006-10-27 2009-05-26 Magnets for use in magnetic resonance imaging

Country Status (6)

Country Link
US (1) US8421463B2 (en)
CN (1) CN101606208B (en)
AU (1) AU2007308759B2 (en)
DE (1) DE112007002511B4 (en)
GB (1) GB2456968B (en)
WO (1) WO2008049174A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009259923A (en) * 2008-04-15 2009-11-05 Japan Superconductor Technology Inc Superconducting magnet and magnetic device equipped with it

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2283374A4 (en) * 2008-05-08 2012-01-04 Univ Queensland Arrangement of coils for mri apparatus
CN102842974B (en) * 2012-08-03 2015-06-03 埃塞克科技有限公司 Transverse flux electric machine
CN103077798B (en) * 2013-01-06 2015-08-12 中国科学院电工研究所 A kind of magnetic resonance image-forming superconducting magnet for animal imaging
US10718833B2 (en) * 2014-08-18 2020-07-21 Magnetica Limited Magnet for head extremity imaging
US10627464B2 (en) 2016-11-22 2020-04-21 Hyperfine Research, Inc. Low-field magnetic resonance imaging methods and apparatus
US10718842B2 (en) 2016-11-22 2020-07-21 Hyperfine Research, Inc. Systems and methods for automated detection in magnetic resonance images
CN107281653A (en) * 2017-06-06 2017-10-24 张坤 Mri guided radiation therapy apparatus
WO2020163892A1 (en) * 2019-02-12 2020-08-20 Magnetica Limited Magnets and magnetic resonance imaging systems

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5818319A (en) * 1995-12-21 1998-10-06 The University Of Queensland Magnets for magnetic resonance systems
US6140900A (en) * 1999-08-03 2000-10-31 The University Of Queensland Assymetric superconducting magnets for magnetic resonance imaging
US6479999B1 (en) * 2001-06-05 2002-11-12 Koninklijke Philips Electronics N.V. Efficiently shielded MRI gradient coil with discretely or continuously variable field of view

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04240440A (en) * 1991-01-23 1992-08-27 Toshiba Corp Magnet for mri apparatus
EP0535735A1 (en) * 1991-10-03 1993-04-07 Koninklijke Philips Electronics N.V. Magnetic resonance apparatus comprising a shielded magnet
US5359310A (en) * 1992-04-15 1994-10-25 Houston Advanced Research Center Ultrashort cylindrical shielded electromagnet for magnetic resonance imaging
US5646532A (en) 1993-09-20 1997-07-08 Bruker Medizintechnik Gmbh Partial body tomograph
US5396207A (en) 1994-08-05 1995-03-07 General Electric Company On-shoulder MRI magnet for human brain imaging
US5416415A (en) * 1994-08-05 1995-05-16 General Electric Company Over-shoulder MRI magnet for human brain imaging
US5801609A (en) 1997-04-25 1998-09-01 General Electric Company MRI head magnet
US6700468B2 (en) * 2000-12-01 2004-03-02 Nmr Holdings No. 2 Pty Limited Asymmetric magnets for magnetic resonance imaging
CN2519391Y (en) * 2001-06-25 2002-10-30 华东师范大学 Magnetic field uniformity regulatable permanent magnet
CN100350522C (en) * 2004-05-18 2007-11-21 北京泰杰磁电研究所 Magnetic resonant image-forming magnetic body and forming method thereof
US7212004B2 (en) * 2005-07-19 2007-05-01 Magnetica Limited Multi-layer magnet
US7579838B2 (en) * 2005-11-18 2009-08-25 General Electric Company Systems, methods and apparatus for a partially elongated field of view in a magnetic resonance imaging system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5818319A (en) * 1995-12-21 1998-10-06 The University Of Queensland Magnets for magnetic resonance systems
US6140900A (en) * 1999-08-03 2000-10-31 The University Of Queensland Assymetric superconducting magnets for magnetic resonance imaging
US6479999B1 (en) * 2001-06-05 2002-11-12 Koninklijke Philips Electronics N.V. Efficiently shielded MRI gradient coil with discretely or continuously variable field of view

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009259923A (en) * 2008-04-15 2009-11-05 Japan Superconductor Technology Inc Superconducting magnet and magnetic device equipped with it

Also Published As

Publication number Publication date
AU2007308759A1 (en) 2008-05-02
DE112007002511T5 (en) 2009-09-03
GB0908983D0 (en) 2009-07-01
GB2456968B (en) 2010-03-10
US8421463B2 (en) 2013-04-16
CN101606208A (en) 2009-12-16
DE112007002511B4 (en) 2022-09-29
US20100079144A1 (en) 2010-04-01
AU2007308759B2 (en) 2011-05-12
WO2008049174A1 (en) 2008-05-02
CN101606208B (en) 2012-05-09

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